Hydrodynamic Cavitation Device with Triangular Plates
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Solution Overview
Problem
Existing hydrodynamic cavitation devices are not economically feasible for high flow rate and rapid mixing applications, and they lack the ability to modify cavitation effects effectively using external shear plates.
Innovation Solution
A cylindrical flow-through chamber with radially inward triangular plates at oblique angles and sharp edges, featuring orifices to control fluid velocity and induce shearing, creating intense cavitation and OH-radicals for enhanced mixing and oxidation of contaminants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional static mixers are used, then the device structure is simple, but they cannot achieve high flow rate and rapid mixing
Solution Approach 1:
The flow-through chamber is divided into multiple stages, with each stage containing triangular plates with multiple orifices. This segmentation allows the device to handle high flow rates while maintaining effective mixing through distributed cavitation zones across multiple stages rather than a single complex structure
Solution Approach 2:
The invention utilizes hydrodynamic cavitation - a fluid dynamics phenomenon - as the core mixing mechanism. By designing plates with specific orifice geometries and arrangements, the device creates controlled cavitation bubbles that implode to generate intense mixing forces, replacing mechanical mixing elements with fluid-based mixing
2Adaptability or versatility
If traditional cavitation devices are used, then cavitation effects are limited, but they lack the ability to modify cavitation effects with external plates
Solution Approach 1:
The triangular plates are positioned at oblique angles to the flow direction, creating dynamic flow patterns that vary along the flow path. The plates are arranged to create restricted passageways that modify local flow velocity and pressure distributions, enabling control over cavitation intensity and distribution without requiring complex adjustable mechanisms
Solution Approach 2:
Different regions of the flow-through chamber have different plate configurations - upstream plates have larger diameters than downstream plates, and plates are positioned at different oblique angles. This local variation in geometry creates zones with different cavitation intensities, allowing tailored cavitation effects for different processing requirements along the flow path
3Productivity
If flow restriction is increased to create cavitation, then mixing efficiency improves, but pressure loss increases
Solution Approach 1:
The device optimizes the balance between flow restriction and pressure loss by carefully selecting orifice diameter, plate thickness, and plate angle parameters. The triangular plate geometry with oblique angles creates effective flow restriction for cavitation generation while minimizing turbulence-induced pressure losses compared to abrupt contractions
Solution Approach 2:
The multiple stages with progressively smaller plate diameters create cumulative cavitation effects. Rather than using one severe restriction, the device uses multiple milder restrictions in sequence, each contributing to cavitation while maintaining more favorable pressure characteristics than a single severe restriction would create
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device achieves increased effluent saturation, bacteria cell wall disruption, and continuous flushing, effectively reducing bacteria load and contaminant oxidation with minimal pressure loss and clogging prevention.
Implementation Method 1
Hydrodynamic cavitation is the result of a flow constriction wherein a liquid falls below the vapor pressure and forms vapor-filled gas bubbles
Implementation Method 2
the result is a local pressure drop caused by the liquid movement. At a particular velocity the pressure may fall below the vapor pressure of the liquid being pumped
Implementation Method 3
If the static pressure then increases and exceeds the vapor pressure, these vapor-filled gas bubbles collapse implosively
Implementation Method 4
The magnitude of the pressure impulses within the collapsing cavities and bubbles may reach ultra high pressures implosions leading to the formation of shock waves
Implementation Method 5
Each plate has a plurality of orifices designed to control the velocity of fluid flow. Each orifice and each plate have sharp edges to induce shearing
Implementation Method 6
The cavitation and associated effects are useful mixing, emulsifying and dispersing various components in a flowing liquid
Data Source
AI summary
An advanced hydrodynamic cavitation device formed from a cylindrical tube having a flow through chamber. The chamber has a series of stages with each stage formed from at least three plates spaced annularly and extending radially inward at an oblique angle with respect to the longitudinal axis of the flow through chamber. Each plate has shear inducing side edges and a plurality of orifices with shear inducing edges. The orifices are arranged perpendicular to the plates and shaped to control the velocity of the fluid. An unrestricted passageway exists along the central axis of the flow through chamber to provide a constant flow for continuous flushing of suspended solids to prevent clogging. Additionally, the passageway will facilitate the insertion of a pressure cleaning tube without requiring that the device be disassembled.